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Is the Poincare disk a model for hyperbolic geometry? The Poincare disk is a model for hyperbolic geometry. Proving this assertion´ meansprovingthat,withthetermspoint,line,distance,etc.interpretedasabove,all the axioms of hyperbolic geometry are satisfied. Since the model is described within Euclideangeometry,thoseproofsareallEuclideanproofs. What kind of line …

Can you break your nose in BJJ? The chance of it getting hit hard is very rare and the chance of a broken nose is practically impossible. I have been hit on the nose twice in BJJ and neither of …